Question

Choose the correct option regarding the statements given below.

Statement 1: Magnesium burns in air with a dazzling white flame.

Statement 2: Metals on reaction with water produce metal oxide along with oxygen.

• A. Statement 1 is true and statement 2 is false.
• B. Statement 1 is false and statement 2 is true.
• C. Both statements 1 and 2 are true.
• D. Both statements 1 and 2 are false.

Answer 1

The correct option is A Statement 1 is true and statement 2 is false.

Metals on reaction with oxygen produce metal oxide. Being a metal, magnesium burns in air with a dazzling white flame to form magnesium oxide. The reaction involved is:

$2\mathrm{Mg}\left(s\right)+O_2\left(g\right)\stackrel{\Delta }{\to }2\mathrm{MgO}\left(s\right)$

Metals react with water to form metal hydroxide and hydrogen gas.

For example: sodium reacts with cold water to form sodium hydroxide and hydrogen gas. The reaction involved is:

$2\mathrm{Na}\left(s\right)+2H_{2}O\left(l\right)\stackrel{}{\to }2\mathrm{NaOH}\left(\mathrm{aq}\right)+H_2\left(g\right)$